STMicroelectronics Low Drop Voltage Regulator 2.5-18V Input, 200mA Output Current, Low Noise, RoHS LDK320AU50R

STMicroelectronics LDK320AU50R is a low dropout voltage regulator designed to provide a maximum output current of 200 mA from input voltages ranging between 2.5 V and 18 V. It enables low noise, stable voltage supply ideal for low power battery-operated applications and sensitive electronics.

Built with a typical dropout voltage of only 100 mV at 100 mA load, this regulator ensures efficient power usage. A low quiescent current of 60 μA during operation and 1 μA during off mode prolongs battery life, making it suitable for portable and battery-powered devices.

The device features logic-controlled enable pins allowing shutdown mode where the current consumption is below 1 μA. It is stabilized with a ceramic output capacitor of 1 μF to guarantee stability across varying load conditions. The high power supply ripple rejection (PSRR) of 88 dB at 120 Hz contributes to the low noise output performance, critical for sensitive circuits.

Comprehensive protections are integrated including current limiting, safe operating area (SOA) protection, and thermal shutdown to ensure device reliability and prevent damage under fault conditions. It operates reliably in ambient temperatures ranging from -40°C to +125°C, making it suitable for a wide variety of environments including industrial and automotive electronics systems (though not automotive standard compliant).

Input voltage range: 2.5 V to 18 V. Output current capability: up to 200 mA. Dropout voltage: 100 mV typical at 100 mA load. Quiescent current: 60 μA typical, 1 μA in shutdown mode. High PSRR of 88 dB at 120 Hz. Logic control electronic shutdown.

Ceramic output capacitor of 1 μF compatibility. Current, SOA, and thermal protections included. Operating temperature range: -40°C to 125°C.

This voltage regulator is widely used in electronics and electrical applications, including industrial designs, laboratory equipment, and low power embedded systems requiring efficient and reliable voltage regulation. It complies with RoHS directives, supporting environmentally conscious manufacturing.

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